MADISON, Wis. (AP) — Wisconsin Republican Sen. Ron Johnson on Monday defended his investment in an Irish company that distributes products made by the plastic manufacturer he used to own before being elected to the U.S. Senate in 2010.

CHICAGO (AP) — Democratic U.S. Rep. Tammy Duckworth unseated Republican U.S. Sen. Mark Kirk on Tuesday, delivering a win that her party is banking on as it attempts to retake control of the Senate and becoming the second woman to represent Illinois in the chamber.

WASHINGTON (AP) — Republican Sen. David Perdue of Georgia said Monday it would be a "dereliction of duty" for the Senate to fail to act on Hillary Clinton's Supreme Court nominees if she becomes president.